Chirping noise in rear end of my truck?

I have a 1990 Ford ranger xlt V6 4.0 l truck. When I start to drive I heear a chirping noise and as I speed up its gets louder, but then goes away an then it will ride rough… Like it's vibrating. The u-joints seem ok an shaft does too.can't figure what's doing it.

Classic dry U-joint sound. The U-joint may or may not be loose, but I'll bet one or more of the cups has no grease.Usually it's only the rear one, but I almost always change both while I'm there.

Check rear brakes maybe a brake shoe dragging

Bad rear gears

Check the drive-shaft U-joints.

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